/**
 * 绘制3d图
 * @param pieData 总数据
 * @param internalDiameterRatio:透明的空心占比
 * @param distance 视角到主体的距离
 * @param alpha 旋转角度
 * @param pieHeight 立体的高度
 * @param opacity 饼或者环的透明度
 */
const getPie3D = (
    pieData,
    internalDiameterRatio,
    distance,
    alpha,
    pieHeight,
    opacity=1,   
  ) => {
    const series = [];
    let sumValue = 0;
    let startValue = 0;
    let endValue = 0;
    let legendData = [];
    let legendBfb = [];
    const k = 1 - internalDiameterRatio;
    pieData.sort((a, b) => {
      return b.value - a.value;
    });
    // 为每一个饼图数据，生成一个 series-surface 配置
    for (let i = 0; i < pieData.length; i++) {
      sumValue += pieData[i].value;
      const seriesItem = {
        name:
          typeof pieData[i].name === "undefined" ? `series${i}` : pieData[i].name,
        type: "surface",
        parametric: true,
        wireframe: {
          show: false,
        },
        pieData: pieData[i],
        pieStatus: {
          selected: false,
          hovered: false,
          k: k,
        },
        center: ["10%", "50%"],
      };
      if (typeof pieData[i].itemStyle !== "undefined") {
        const itemStyle = {};
        itemStyle.color =
          typeof pieData[i].itemStyle.color !== "undefined"
            ? pieData[i].itemStyle.color
            : opacity;
        itemStyle.opacity =
          typeof pieData[i].itemStyle.opacity !== "undefined"
            ? pieData[i].itemStyle.opacity
            : opacity;
        seriesItem.itemStyle = itemStyle;
      }
      series.push(seriesItem);
    }
  
    // 使用上一次遍历时，计算出的数据和 sumValue，调用 getParametricEquation 函数，
    // 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation，也就是实现每一个扇形。
    legendData = [];
    legendBfb = [];
    for (let i = 0; i < series.length; i++) {
      endValue = startValue + series[i].pieData.value;
      series[i].pieData.startRatio = startValue / sumValue;
      series[i].pieData.endRatio = endValue / sumValue;
      series[i].parametricEquation = getParametricEquation(
        series[i].pieData.startRatio,
        series[i].pieData.endRatio,
        false,
        false,
        k,
        series[i].pieData.value
      );
      startValue = endValue;
      const bfb = fomatFloat(series[i].pieData.value / sumValue, 4);
      legendData.push({
        name: series[i].name,
        value: bfb,
      });
      legendBfb.push({
        name: series[i].name,
        value: bfb,
      });
    }
    const boxHeight = getHeight3D(series, pieHeight); // 通过pieHeight设定3d饼/环的高度，单位是px
    // 准备待返回的配置项，把准备好的 legendData、series 传入。
    const option = {
      grid: {
                    // right: '19%',
                    // left: '20%',
                    top: '50px',
                    // bottom: '10%',
                },
      legend: {
        show: true,
        data: legendData,
        orient: "horizontal",
        left: 10,
        top: 0,
        itemGap: 10,
        textStyle: {
          color: "#fff",
          fontSize: 15,
        },
        icon: "circle",
        formatter: function (param) {
          const item = legendBfb.filter((item) => item.name === param)[0];
          const bfs = fomatFloat(item.value * 100, 2) + "%";
          return `${item.name}  ${bfs}`;
        },
      },
      labelLine: {
        show: true,
        lineStyle: {
          color: "#fff",
        },
      },
      label: {
        show: true,
        position: "outside",
        formatter: "{b} \n{c} {d}%",
      },
      tooltip: {
        backgroundColor: "#033b77",
        borderColor: "#21f2c4",
        textStyle: {
          color: "#fff",
          fontSize: 13,
        },
        formatter: (params) => {
          if (
            params.seriesName !== "mouseoutSeries" &&
            params.seriesName !== ""
          ) {
            // console.log(option.series,params.seriesName,'option.series[params.seriesIndex].pieData');
            const bfb = (
              (option.series[params.seriesIndex].pieData.endRatio -
                option.series[params.seriesIndex].pieData.startRatio) *
              100
            ).toFixed(2);
            return (
              `${params.seriesName}<br/>` +
              `<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` +
              `${bfb}%`
            );
          }
        },
      },
      xAxis3D: {
        min: -1,
        max: 1,
      },
      yAxis3D: {
        min: -1,
        max: 1,
      },
      zAxis3D: {
        min: -1,
        max: 1,
      },
      grid3D: {
        show: false,
        boxHeight: boxHeight, // 圆环的高度
        viewControl: {
          // 3d效果可以放大、旋转等，请自己去查看官方配置
          alpha, // 角度
          distance, // 调整视角到主体的距离，类似调整zoom
          rotateSensitivity: 0, // 设置为0无法旋转
          zoomSensitivity: 0, // 设置为0无法缩放
          panSensitivity: 0, // 设置为0无法平移
          autoRotate: false, // 自动旋转
        },
      },
      series: series,
    };
    return option;
  };
  
  /**
   * 生成扇形的曲面参数方程，用于 series-surface.parametricEquation
   */
  const getParametricEquation = (
    startRatio,
    endRatio,
    isSelected,
    isHovered,
    k,
    h
  ) => {
    // 计算
    const midRatio = (startRatio + endRatio) / 2;
    const startRadian = startRatio * Math.PI * 2;
    const endRadian = endRatio * Math.PI * 2;
    const midRadian = midRatio * Math.PI * 2;
    // 如果只有一个扇形，则不实现选中效果。
    if (startRatio === 0 && endRatio === 1) {
      isSelected = false;
    }
    // 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
    k = typeof k !== "undefined" ? k : 1 / 3;
    // 计算选中效果分别在 x 轴、y 轴方向上的位移（未选中，则位移均为 0）
    const offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
    const offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;
    // 计算高亮效果的放大比例（未高亮，则比例为 1）
    const hoverRate = isHovered ? 1.05 : 1;
    // 返回曲面参数方程
    return {
      u: {
        min: -Math.PI,
        max: Math.PI * 3,
        step: Math.PI / 32,
      },
      v: {
        min: 0,
        max: Math.PI * 2,
        step: Math.PI / 20,
      },
      x: function (u, v) {
        if (u < startRadian) {
          return (
            offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate
          );
        }
        if (u > endRadian) {
          return (
            offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate
          );
        }
        return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate;
      },
      y: function (u, v) {
        if (u < startRadian) {
          return (
            offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate
          );
        }
        if (u > endRadian) {
          return (
            offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate
          );
        }
        return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate;
      },
      z: function (u, v) {
        if (u < -Math.PI * 0.5) {
          return Math.sin(u);
        }
        if (u > Math.PI * 2.5) {
          return Math.sin(u) * h * 0.1;
        }
        return Math.sin(v) > 0 ? 1 * h * 0.1 : -1;
      },
    };
  };
  
  /**
   * 获取3d丙图的最高扇区的高度
   */
  const getHeight3D = (series, height) => {
    series.sort((a, b) => {
      return b.pieData.value - a.pieData.value;
    });
    return (height * 25) / series[0].pieData.value;
  };
  
  /**
   * 格式化浮点数
   */
  const fomatFloat = (num, n) => {
    let f = parseFloat(num);
    if (isNaN(f)) {
      return false;
    }
    f = Math.round(num * Math.pow(10, n)) / Math.pow(10, n); // n 幂
    let s = f.toString();
    let rs = s.indexOf(".");
    // 判定如果是整数，增加小数点再补0
    if (rs < 0) {
      rs = s.length;
      s += ".";
    }
    while (s.length <= rs + n) {
      s += "0";
    }
    return s;
  };
  
  export { getPie3D, getParametricEquation };
